Like life imitating art, “Smash” star Katharine McPhee and director Michael Morris were caught kissing in Hollywood this week… a case of McPheever that may cost Michael his marriage!

TMZ broke the news, noting that the married McPhee actually split with husband Nick Cokas six months ago. Page Six says the "American Idol" winner was blindsided by the scandalous pics. “Katharine didn’t know about the photos in advance. She only saw them on Monday when they were emailed to her.”

Now, Life & Style reports that Michael’s wife, actress Mary McCormack, just learned of the alleged affair, and she's fuming.

A source told the mag that Michael dropped the bombshell this week, explaining, "They've been together for more than 10 years and always had such a solid marriage. They have three daughters, so it's incredibly sad. He wants to keep the family together, but as far as Mary is concerned, it's over. There's no going back."

[Credit: Getty Images]

McCormack, who recently starred in the cancelled NBC series “Welcome to the Family,” supposedly never saw the scandal coming. “She is beyond furious and is absolutely devastated,” the insider said. “So is Michael. He really wants to make it work between them and try and save the marriage. But at the moment, Mary wants to split up with him."

In 2010 Mary discussed her marriage with "Private Parts" co-star Howard Stern. The shock jock asked if she was worried about her husband cheating while she was working out of town, and she said no, calling him the one thing she got right. At one point, Howard compares Michael to Sandra Bullock's ex Jesse James! Listen below (the marriage talk starts about three minutes in).

In the wake of the scandal, DeadlineHollywood.com reports that Morris has dropped out of his latest project, E!'s "Songbyrd." The site also points out that Michael's most recent gig was on the show "Betrayal," where he directed an episode about an extramarital affair!

The couple wed in 2003 and has three daughters; Margaret, 9, Rose, 6, and Lillian, 2.